Tomorrow, Caltrans, Mendocino County, the City of Ukiah, and Castle Tire will hold a free unused tire collection from 10 a.m. until 2 p.m. on Airport Blvd. just past Costco off Talmage Rd, Ukiah. There are a few rules, Identification will be required for proof of residency. Residents may bring up to nine passenger car and light truck tires for disposal. No tires from businesses or bicycle tires. The collection is part of Clean California Community Days, a statewide initiative featuring volunteer service events focused on keeping California clean.